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Optical monitoring the degradation of PLGA inverse opal film

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Chinese Chemical Letters 2013年第1期24卷 9-12页

作者： Li-Guo Sun Zhuo-Ying xie Yuan-jin zhao Hong-Mei Wei Zhong-Ze Gu State Key Laboratory of Bioelectronics Southeast University School of Chemistry and Materials Heilongjiang University

Implantable materials have broad applications in tissue engineering and in vivo sensors. It is essential to know the detailed information of the implantable materials during their degradation. In this paper, we developed a method to monitor the degradation process of a well-used biomaterial, poly（lactide-co- glycolide）（PLGA） by taking advantage of inverse opal structure. We found that mass loss, molecular weight and glass transition temperature of PLGA during the degradation process in Hank＇s artificial body fluid can be in situ monitored bv measuring the ootical orooerties of PLGA inverse ooal.

关键词： PLGA inverse opalDegradationOptical monitoring

Cycloaddition reactions of benzyne with olefins

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Chinese Chemical Letters 2014年第12期25卷 1535-1539页

作者： zhao Chen xie Han jin-Hua Liang Jun Yin Guang-Ao Yu Sheng-Hua Liu Key Laboratory of Pesticide and Chemical Biology Ministry of EducationCollege of ChemistryCentral China Normal University

Some novel cycloaddition reactions based on benzyne and olefins have been *** reactions were performed in the absence of a transition metal catalyst,and they displayed good *** cycloaddition reactions of benzyne with olefins provide effective routes for synthesizing benzocyclobutenes,biaryl compounds and 9,10-dihydrophenanthrene derivatives.

关键词： Cycloaddition Benzyne Olefins Benzocyclobutenes Biaryl 9 10-Dihydrophenanthrene

The synthesis and molecular recognization of the polyamine transporter of hydrazine-modified diamine conjugates

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Chinese Chemical Letters 2008年第1期19卷 99-101页

作者： Jun Jun Zhou Hao Huang Song Qiang xie Yu XiaWang jin zhao Chao Jie Wang Institute of Natural Products ＆ Medicinal Chemistry Henan University Kaifeng 475001 China Chemistry Department Henan University Kaifeng 475001 China Pharmacy College Henan University Kaifeng 475001 China

A series of four novel hydrazine-modified diamine conjugates （7a-b, 8a-b） were synthesized and evaluated for cytotoxicity against Melanoma B 16, α-difluoromethylornithine （DFMO）-treated B 16, spermidine （SPD）-treated B 16, Mouse leukemia L 1210 and Hela cell lines. Both the DFMO-B 16 and SPD-B 16 experiments indicated that conjugates 7a-b and 8a-b could recognize the polyamine transporter （PAT） and enter the cells in part or in whole via PAT, although they were not as efficient as the reference, 9- anthracenemethyl homospermidine （1）. 2007 Chao Jie Wang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Polyamine conjugate Synthesis Bioevaluation

Unsupervised spectral feature selection algorithms for high dimensional data

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Frontiers of Computer Science 2023年第5期17卷 27-40页

作者： Mingzhao WANG Henry HAN zhao HUANG Juanying xie School of Computer Science Shaanxi Normal UniversityXi’an 710119China Department of Computer Science School of Engineering&Computer ScienceBaylor UniversityWacoTX 76798USA

It is a significant and challenging task to detect the informative features to carry out explainable analysis for high dimensional data,especially for those with very small number of *** selection especially the unsupervised ones are the right way to deal with this challenge and realize the ***,two unsupervised spectral feature selection algorithms are proposed in this *** group features using advanced Self-Tuning spectral clustering algorithm based on local standard deviation,so as to detect the global optimal feature clusters as far as *** two feature ranking techniques,including cosine-similarity-based feature ranking and entropy-based feature ranking,are proposed,so that the representative feature of each cluster can be detected to comprise the feature subset on which the explainable classification system will be *** effectiveness of the proposed algorithms is tested on high dimensional benchmark omics datasets and compared to peer methods,and the statistical test are conducted to determine whether or not the proposed spectral feature selection algorithms are significantly different from those of the peer *** extensive experiments demonstrate the proposed unsupervised spectral feature selection algorithms outperform the peer ones in comparison,especially the one based on cosine similarity feature ranking *** statistical test results show that the entropy feature ranking based spectral feature selection algorithm performs *** detected features demonstrate strong discriminative capabilities in downstream classifiers for omics data,such that the AI system built on them would be reliable and *** is especially significant in building transparent and trustworthy medical diagnostic systems from an interpretable AI perspective.

关键词： feature selection spectral clustering feature ranking techniques entropy cosine similarity

A Levenberg–Marquardt Method for Solving the Tensor Split Feasibility Problem

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Journal of the Operations Research Society of China 2021年第4期9卷 797-817页

作者： Yu-Xuan jin jin-Ling zhao School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China

This paper considers the tensor split feasibility *** C and Q be non-empty closed convex set and A be a semi-symmetric *** tensor split feasibility problem is to find x∈C such that Axm−1∈*** we simply take this problem as a special case of the nonlinear split feasibility problem,then we can directly get a projection method to solve ***,applying this kind of projection method to solve the tensor split feasibility problem is not so *** we propose a Levenberg–Marquardt method to achieve higher *** analyses are conducted,and some preliminary numerical results show that the Levenberg–Marquardt method has advantage over the common projection method.

关键词： Tensor Split feasibility problem Semi-symmetric Projection Levenberg-Marquardt method

A multicolor photometric study of the neglected eclipsing binary FT Ursae Majoris

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Research in Astronomy and Astrophysics 2011年第10期11卷 1158-1162页

作者： jin-zhao Yuan Department of Physics Shanxi Normal University Linfen 041004 China

The multicolor photometric observations of the neglected eclipsing binary FT Ursae Majoris （FT UMa） were obtained in 2010. The 2003 version of the Wilson- Devinney code was used to analyze the light curves in the B, V and R bands simultaneously. Based on the spectroscopic mass ratio q = 0.984 published by Pribulla et al., it is found that FT UMa is an evolved contact binary with a contact degree of 15.3%. The low amplitude of light variations, N 0.15 mag, arises mainly from a moderately low inclination angle of i = 62.80° and almost identical components in size rather than the light dilution of a third component, which contributes light of only - 10%.

关键词： stars binaries close -- stars binaries clipsing -- stars individual FTUrsae Majoris

A Visco-hyperelastic Constitutive Model for Rubber Considering the Strain Level and One Case Study in the Sealing Packer

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Acta Mechanica Solida Sinica 2023年第5期36卷 710-723页

作者： Lan jin Demin zhao Jianlin Liu College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao 266580China

The rubber cylinder is a key component for maintaining the sealing pressure of the packer,particularly in deep underground *** stress relaxation of materials,as a typical feature of viscoelasticity,has become one of the main factors causing the failure of rubber cylinders in *** the present study,a visco-hyperelastic model for the sealing rubber considering different strain levels is proposed based on the Prony ***,the uniaxial compression stress relaxation experiments are conducted on the sealing rubber under different temperatures and strain levels,and the model parameters are thereby *** a case study,the proposed model is incorporated into the ABAQUS software via the UM AT subroutine,and the finite element simulation of the sealing packer is carried *** results show that the sealing performance of the packer improves with a decrease in temperature or an increase in strain *** is also noted that a large strain level can lead to the protrusion of the shoulder of the rubber cylinder.

关键词： Visco-hyperelastic model Temperature Strain level Rubber cylinder Sealing performance

Assessment and prediction of the mechanical properties of ternary geopolymer concrete

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Frontiers of Structural and Civil Engineering 2022年第11期16卷 1436-1452页

作者： jinliang LIU Wei zhao Xincheng SU Xuefeng xie School of Civil Engineering Northeast Forestry UniversityHarbin 150040China

This paper utilized granulated blast furnace slag(GBFS),fly ash(FA),and zeolite powder(ZP)as the binders of ternary geopolymer concrete(TGC)activated with sodium silicate *** effects of alkali content(AC)and alkaline activator modulus(AAM)on the compressive strength,flexural tensile strength and elastic modulus of TGC were tested and the SEM micrographs were *** experimental results were then compared with the predictions based on models of mechanical properties,and the amended models of TGC were proposed taking account of the effects of AC and *** results indicated that increasing AC and reducing AAM which were in the specific ranges(5%to 7%and 1.1 to 1.5,respectively)had positive effects on the mechanical properties of *** addition,the flexural tensile strength of TGC was 27.7%higher than that of OPC at the same compressive strength,while the elastic modulus of TGC was 25.8%lower than that of *** prediction models with the R2 of 0.945 and 0.987 for predicting flexural tensile strength and elastic modulus using compressive strength,respectively,were *** models,considering the effects of AC and AAM,were also proposed to predict the mechanical properties of TGC.

关键词： Ternary Geopolymer Concrete(TGC) alkaline activator modulus alkali content mechanical properties assessment

Global Analysis of Non-coding Small RNAs in Arabidopsis in Response to Jasmonate Treatment by Deep Sequencing Technology

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Journal of Integrative Plant Biology 2012年第2期54卷 73-86页

作者： Bosen Zhang Zhiping jin Daoxin xie School of Life Sciences TsinghuaUniversityBeijing 100084China MOE Key Laboratory of Bioinformatics Tsinghua UniversityBeijing 100084China State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China

In plants, non-coding small RNAs play a vital role in plant development and stress responses. To explore the possible role of non-coding small RNAs in the regulation of the jasmonate （JA） pathway, we compared the non-coding small RNAs between the JA-deficient aos mutant and the JA-treated wild type Arabidopsis via high-throughput sequencing. Thirty new miRNAs and 27 new miRNA candidates were identified through bioinformatics approach. Forty-nine known miRNAs （belonging to 24 families）, 15 new miRNAs and new miRNA candidates （belonging to 11 families） and 3 tasiRNA families were induced by JA, whereas 1 new miRNA, 1 tasiRNA family and 22 known miRNAs （belonging to 9 families） were repressed by JA.

关键词： Non-coding small RNAs jasmonate Arabidopsis Solexa deep sequencing